From 818f5a5efe99a1904f5e575e8de3050d97f03cfa Mon Sep 17 00:00:00 2001
From: Artem Bilan <abilan@vmware.com>
Date: Mon, 27 Jul 2020 09:59:24 -0400
Subject: [PATCH] Synchronize list of events for FTP server tests

---
 .../integration/ftp/outbound/FtpServerOutboundTests.java       | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spring-integration-ftp/src/test/java/org/springframework/integration/ftp/outbound/FtpServerOutboundTests.java b/spring-integration-ftp/src/test/java/org/springframework/integration/ftp/outbound/FtpServerOutboundTests.java
index 2ad72ac712..5ef924cb9d 100644
--- a/spring-integration-ftp/src/test/java/org/springframework/integration/ftp/outbound/FtpServerOutboundTests.java
+++ b/spring-integration-ftp/src/test/java/org/springframework/integration/ftp/outbound/FtpServerOutboundTests.java
@@ -34,6 +34,7 @@ import java.net.InetSocketAddress;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Calendar;
+import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.BlockingQueue;
@@ -800,7 +801,7 @@ public class FtpServerOutboundTests extends FtpTestSupport {
 	@Component
 	public static class Config {
 
-		final List<ApacheMinaFtpEvent> events = new ArrayList<>();
+		final List<ApacheMinaFtpEvent> events = Collections.synchronizedList(new ArrayList<>());
 
 		private volatile String targetLocalDirectoryName;